Question

A RAY OF LIGHT TRAVELLING IN MEDIUM A WITH REFRACTIVE INDEX 1 ENTERS MEDIUM B WITH REFRACTIVE INDEX 1.4 ..... STATE YOUR OBSERVATION

Answer 1

Answer:

A is rarer medium. B is denser medium

As ray travels from A to B, it moves towards the normal.

Answer 2

Answer:

From Snell's Law, μ=

sinr

sini

As r=

2

i

So, μ=

sin

2

i

sini

=

sin

2

i

2sin

2

i

cos

2

i

=2cos

2

i

⇒cos

2

i

=

2

μ

⇒

2

i

=cos

−1

2

μ

⇒i=2cos

−1

2

μ

.

Explanation:

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